java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:51:23,909 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:51:23,911 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:51:23,923 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:51:23,923 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:51:23,924 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:51:23,926 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:51:23,927 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:51:23,929 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:51:23,930 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:51:23,931 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:51:23,931 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:51:23,932 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:51:23,933 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:51:23,934 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:51:23,935 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:51:23,936 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:51:23,938 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:51:23,940 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:51:23,942 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:51:23,943 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:51:23,944 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:51:23,947 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-07-24 12:51:23,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:51:23,983 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:51:23,984 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:51:23,985 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:51:23,985 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:51:23,985 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:51:23,985 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:51:23,986 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:51:23,986 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:51:23,986 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:51:23,986 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:51:23,987 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:51:23,988 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:51:23,988 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:51:23,989 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:51:23,989 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:51:23,989 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:51:23,989 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:51:23,989 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:51:23,990 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:51:23,990 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:51:23,990 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:51:23,991 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:51:23,991 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:51:23,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:51:23,992 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:51:23,992 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:51:23,992 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:51:23,992 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:51:23,993 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:51:23,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:51:23,993 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:51:23,993 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:51:23,994 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:51:24,061 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:51:24,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:51:24,086 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:51:24,087 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:51:24,088 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:51:24,089 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-07-24 12:51:24,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f36f2a7/3bfc1f241b35464cbc88d2896fb5c43f/FLAG979d98b00 [2018-07-24 12:51:24,789 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:51:24,792 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label20_true-unreach-call.c [2018-07-24 12:51:24,822 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f36f2a7/3bfc1f241b35464cbc88d2896fb5c43f/FLAG979d98b00 [2018-07-24 12:51:24,847 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35f36f2a7/3bfc1f241b35464cbc88d2896fb5c43f [2018-07-24 12:51:24,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:51:24,862 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:51:24,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:24,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:51:24,871 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:51:24,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:24" (1/1) ... [2018-07-24 12:51:24,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536648b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:24, skipping insertion in model container [2018-07-24 12:51:24,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:51:24" (1/1) ... [2018-07-24 12:51:25,193 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:51:25,780 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:25,800 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:51:26,084 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:51:26,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26 WrapperNode [2018-07-24 12:51:26,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:51:26,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:26,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:51:26,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:51:26,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:51:26,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:51:26,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:51:26,289 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:51:26,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... [2018-07-24 12:51:26,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:51:26,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:51:26,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:51:26,653 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:51:26,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:51:26,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:51:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:51:26,727 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:51:26,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 12:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:51:26,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:51:26,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:51:31,795 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:51:31,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:31 BoogieIcfgContainer [2018-07-24 12:51:31,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:51:31,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:51:31,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:51:31,802 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:51:31,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:51:24" (1/3) ... [2018-07-24 12:51:31,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cae3e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:31, skipping insertion in model container [2018-07-24 12:51:31,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:51:26" (2/3) ... [2018-07-24 12:51:31,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cae3e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:51:31, skipping insertion in model container [2018-07-24 12:51:31,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:51:31" (3/3) ... [2018-07-24 12:51:31,806 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20_true-unreach-call.c [2018-07-24 12:51:31,816 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:51:31,827 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:51:31,878 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:51:31,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:51:31,879 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:51:31,880 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:51:31,880 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:51:31,880 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:51:31,880 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:51:31,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:51:31,881 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:51:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-07-24 12:51:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-07-24 12:51:31,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:31,933 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:31,934 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -775720303, now seen corresponding path program 1 times [2018-07-24 12:51:31,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:31,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:31,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:31,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:31,998 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:32,904 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:51:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:33,089 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:33,089 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:33,089 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:33,095 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:33,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:33,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:33,111 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-07-24 12:51:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:35,191 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-07-24 12:51:35,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:35,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-07-24 12:51:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:35,218 INFO L225 Difference]: With dead ends: 848 [2018-07-24 12:51:35,219 INFO L226 Difference]: Without dead ends: 534 [2018-07-24 12:51:35,227 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-07-24 12:51:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-07-24 12:51:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-07-24 12:51:35,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-07-24 12:51:35,366 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 202 [2018-07-24 12:51:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:35,368 INFO L471 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-07-24 12:51:35,368 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-07-24 12:51:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-07-24 12:51:35,389 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:35,389 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:35,390 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash -548370667, now seen corresponding path program 1 times [2018-07-24 12:51:35,393 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:35,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:35,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:35,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:35,984 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:35,984 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:35,984 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:35,987 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:35,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:35,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:35,988 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-07-24 12:51:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:38,179 INFO L93 Difference]: Finished difference Result 1481 states and 2487 transitions. [2018-07-24 12:51:38,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:38,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-07-24 12:51:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:38,189 INFO L225 Difference]: With dead ends: 1481 [2018-07-24 12:51:38,189 INFO L226 Difference]: Without dead ends: 955 [2018-07-24 12:51:38,193 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2018-07-24 12:51:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 954. [2018-07-24 12:51:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2018-07-24 12:51:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1475 transitions. [2018-07-24 12:51:38,237 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1475 transitions. Word has length 215 [2018-07-24 12:51:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:38,238 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1475 transitions. [2018-07-24 12:51:38,238 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1475 transitions. [2018-07-24 12:51:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-07-24 12:51:38,244 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:38,245 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:38,245 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 390107708, now seen corresponding path program 1 times [2018-07-24 12:51:38,246 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:38,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:38,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:38,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:38,247 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:38,560 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:51:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:38,722 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:38,722 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:38,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:38,742 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:39,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:39,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:39,532 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:51:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:39,764 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:39,765 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:39,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:39,782 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:40,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:40,578 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:40,750 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:40,751 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 12:51:40,751 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:40,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:51:40,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:51:40,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:51:40,753 INFO L87 Difference]: Start difference. First operand 954 states and 1475 transitions. Second operand 8 states. [2018-07-24 12:51:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:47,148 INFO L93 Difference]: Finished difference Result 3681 states and 6137 transitions. [2018-07-24 12:51:47,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:51:47,149 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 226 [2018-07-24 12:51:47,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:47,180 INFO L225 Difference]: With dead ends: 3681 [2018-07-24 12:51:47,180 INFO L226 Difference]: Without dead ends: 2733 [2018-07-24 12:51:47,190 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:51:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2018-07-24 12:51:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2666. [2018-07-24 12:51:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2018-07-24 12:51:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3830 transitions. [2018-07-24 12:51:47,331 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3830 transitions. Word has length 226 [2018-07-24 12:51:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:47,332 INFO L471 AbstractCegarLoop]: Abstraction has 2666 states and 3830 transitions. [2018-07-24 12:51:47,332 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:51:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3830 transitions. [2018-07-24 12:51:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-24 12:51:47,345 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:47,345 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:47,346 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1445754330, now seen corresponding path program 1 times [2018-07-24 12:51:47,346 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:47,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:47,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:47,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:47,347 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:47,711 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:47,711 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:51:47,711 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:47,712 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:51:47,713 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:51:47,713 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:47,713 INFO L87 Difference]: Start difference. First operand 2666 states and 3830 transitions. Second operand 3 states. [2018-07-24 12:51:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:51,141 INFO L93 Difference]: Finished difference Result 7869 states and 11698 transitions. [2018-07-24 12:51:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:51:51,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-07-24 12:51:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:51,179 INFO L225 Difference]: With dead ends: 7869 [2018-07-24 12:51:51,179 INFO L226 Difference]: Without dead ends: 5209 [2018-07-24 12:51:51,196 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:51:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2018-07-24 12:51:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 5191. [2018-07-24 12:51:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5191 states. [2018-07-24 12:51:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7447 transitions. [2018-07-24 12:51:51,337 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7447 transitions. Word has length 235 [2018-07-24 12:51:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:51,337 INFO L471 AbstractCegarLoop]: Abstraction has 5191 states and 7447 transitions. [2018-07-24 12:51:51,338 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:51:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7447 transitions. [2018-07-24 12:51:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-07-24 12:51:51,362 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:51,362 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:51,362 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash 286933474, now seen corresponding path program 1 times [2018-07-24 12:51:51,363 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:51,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:51,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:51,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:51,364 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:51,642 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:51:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:51:51,903 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:51:51,904 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:51:51,904 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:51:51,904 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:51:51,904 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:51:51,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:51:51,905 INFO L87 Difference]: Start difference. First operand 5191 states and 7447 transitions. Second operand 6 states. [2018-07-24 12:51:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:51:54,027 INFO L93 Difference]: Finished difference Result 10892 states and 16079 transitions. [2018-07-24 12:51:54,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:51:54,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 237 [2018-07-24 12:51:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:51:54,059 INFO L225 Difference]: With dead ends: 10892 [2018-07-24 12:51:54,060 INFO L226 Difference]: Without dead ends: 5707 [2018-07-24 12:51:54,086 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:51:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2018-07-24 12:51:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5589. [2018-07-24 12:51:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5589 states. [2018-07-24 12:51:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5589 states to 5589 states and 7456 transitions. [2018-07-24 12:51:54,235 INFO L78 Accepts]: Start accepts. Automaton has 5589 states and 7456 transitions. Word has length 237 [2018-07-24 12:51:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:51:54,236 INFO L471 AbstractCegarLoop]: Abstraction has 5589 states and 7456 transitions. [2018-07-24 12:51:54,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:51:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5589 states and 7456 transitions. [2018-07-24 12:51:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-07-24 12:51:54,256 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:51:54,256 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:51:54,257 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:51:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 531313236, now seen corresponding path program 1 times [2018-07-24 12:51:54,257 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:51:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:54,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:51:54,258 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:51:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-07-24 12:51:54,682 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:54,682 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:51:54,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:54,692 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:54,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:51:55,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 73 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-07-24 12:51:55,500 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:51:55,500 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:51:55,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:51:55,519 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:51:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:51:56,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:51:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-07-24 12:51:56,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:51:56,914 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:51:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 73 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-07-24 12:51:57,052 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:51:57,052 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:51:57,053 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:51:57,053 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:51:57,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:51:57,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:51:57,054 INFO L87 Difference]: Start difference. First operand 5589 states and 7456 transitions. Second operand 9 states. [2018-07-24 12:52:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:02,499 INFO L93 Difference]: Finished difference Result 22384 states and 31933 transitions. [2018-07-24 12:52:02,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 12:52:02,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 262 [2018-07-24 12:52:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:02,611 INFO L225 Difference]: With dead ends: 22384 [2018-07-24 12:52:02,612 INFO L226 Difference]: Without dead ends: 16801 [2018-07-24 12:52:02,639 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 1041 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:52:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16801 states. [2018-07-24 12:52:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16801 to 16677. [2018-07-24 12:52:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16677 states. [2018-07-24 12:52:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16677 states to 16677 states and 22205 transitions. [2018-07-24 12:52:03,158 INFO L78 Accepts]: Start accepts. Automaton has 16677 states and 22205 transitions. Word has length 262 [2018-07-24 12:52:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:03,158 INFO L471 AbstractCegarLoop]: Abstraction has 16677 states and 22205 transitions. [2018-07-24 12:52:03,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:52:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 16677 states and 22205 transitions. [2018-07-24 12:52:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-07-24 12:52:03,212 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:03,213 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:03,213 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:03,214 INFO L82 PathProgramCache]: Analyzing trace with hash -982575638, now seen corresponding path program 1 times [2018-07-24 12:52:03,214 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:03,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:03,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:03,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:03,215 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:52:03,822 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:03,823 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:03,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:03,841 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:04,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:04,456 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:05,498 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:05,499 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:05,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:05,687 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:06,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:06,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:06,604 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:06,605 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-07-24 12:52:06,605 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:06,605 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 12:52:06,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 12:52:06,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:52:06,606 INFO L87 Difference]: Start difference. First operand 16677 states and 22205 transitions. Second operand 8 states. [2018-07-24 12:52:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:13,002 INFO L93 Difference]: Finished difference Result 37025 states and 55927 transitions. [2018-07-24 12:52:13,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 12:52:13,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 283 [2018-07-24 12:52:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:13,104 INFO L225 Difference]: With dead ends: 37025 [2018-07-24 12:52:13,104 INFO L226 Difference]: Without dead ends: 20354 [2018-07-24 12:52:13,166 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1138 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2018-07-24 12:52:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20354 states. [2018-07-24 12:52:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20354 to 18752. [2018-07-24 12:52:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18752 states. [2018-07-24 12:52:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18752 states to 18752 states and 22854 transitions. [2018-07-24 12:52:13,746 INFO L78 Accepts]: Start accepts. Automaton has 18752 states and 22854 transitions. Word has length 283 [2018-07-24 12:52:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:13,746 INFO L471 AbstractCegarLoop]: Abstraction has 18752 states and 22854 transitions. [2018-07-24 12:52:13,746 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 12:52:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 18752 states and 22854 transitions. [2018-07-24 12:52:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-24 12:52:13,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:13,790 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:13,790 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1277494781, now seen corresponding path program 1 times [2018-07-24 12:52:13,790 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:13,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:13,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:13,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:13,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 94 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:52:14,311 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:14,311 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:14,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:14,326 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:14,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-07-24 12:52:14,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 12:52:15,095 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:52:15,096 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-07-24 12:52:15,096 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:52:15,096 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:52:15,097 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:52:15,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:52:15,097 INFO L87 Difference]: Start difference. First operand 18752 states and 22854 transitions. Second operand 5 states. [2018-07-24 12:52:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:17,329 INFO L93 Difference]: Finished difference Result 53165 states and 67477 transitions. [2018-07-24 12:52:17,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:52:17,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 289 [2018-07-24 12:52:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:17,462 INFO L225 Difference]: With dead ends: 53165 [2018-07-24 12:52:17,462 INFO L226 Difference]: Without dead ends: 34424 [2018-07-24 12:52:17,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:52:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34424 states. [2018-07-24 12:52:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34424 to 33586. [2018-07-24 12:52:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33586 states. [2018-07-24 12:52:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33586 states to 33586 states and 40400 transitions. [2018-07-24 12:52:18,602 INFO L78 Accepts]: Start accepts. Automaton has 33586 states and 40400 transitions. Word has length 289 [2018-07-24 12:52:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:18,602 INFO L471 AbstractCegarLoop]: Abstraction has 33586 states and 40400 transitions. [2018-07-24 12:52:18,602 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:52:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33586 states and 40400 transitions. [2018-07-24 12:52:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-07-24 12:52:18,649 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:18,649 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:18,649 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash -452205560, now seen corresponding path program 1 times [2018-07-24 12:52:18,650 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:18,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:18,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:18,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:18,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 112 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:19,071 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:19,071 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:19,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:19,079 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:19,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:52:19,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:19,815 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 12:52:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 112 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:20,339 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:20,340 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:20,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:20,373 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:21,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 112 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:52:21,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 112 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:21,272 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:21,272 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 10 [2018-07-24 12:52:21,272 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:21,273 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:52:21,273 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:52:21,274 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:52:21,274 INFO L87 Difference]: Start difference. First operand 33586 states and 40400 transitions. Second operand 7 states. [2018-07-24 12:52:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:26,106 INFO L93 Difference]: Finished difference Result 110930 states and 145018 transitions. [2018-07-24 12:52:26,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:52:26,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 298 [2018-07-24 12:52:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:26,435 INFO L225 Difference]: With dead ends: 110930 [2018-07-24 12:52:26,435 INFO L226 Difference]: Without dead ends: 77355 [2018-07-24 12:52:26,576 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:52:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77355 states. [2018-07-24 12:52:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77355 to 74978. [2018-07-24 12:52:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74978 states. [2018-07-24 12:52:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74978 states to 74978 states and 88757 transitions. [2018-07-24 12:52:28,190 INFO L78 Accepts]: Start accepts. Automaton has 74978 states and 88757 transitions. Word has length 298 [2018-07-24 12:52:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:28,191 INFO L471 AbstractCegarLoop]: Abstraction has 74978 states and 88757 transitions. [2018-07-24 12:52:28,191 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:52:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 74978 states and 88757 transitions. [2018-07-24 12:52:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-07-24 12:52:28,271 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:28,271 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:28,272 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2112084087, now seen corresponding path program 1 times [2018-07-24 12:52:28,272 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:28,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:28,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:28,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:28,273 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:28,867 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:52:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:52:28,971 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:28,971 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:28,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:28,979 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:29,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:52:30,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:30,272 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 12:52:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:30,557 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:30,557 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:30,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:30,573 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:31,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:52:31,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:52:31,579 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:52:31,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 16 [2018-07-24 12:52:31,580 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:52:31,581 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 12:52:31,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 12:52:31,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:52:31,581 INFO L87 Difference]: Start difference. First operand 74978 states and 88757 transitions. Second operand 12 states. [2018-07-24 12:52:36,352 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-07-24 12:52:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:52:51,577 INFO L93 Difference]: Finished difference Result 228279 states and 297544 transitions. [2018-07-24 12:52:51,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-07-24 12:52:51,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 318 [2018-07-24 12:52:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:52:52,479 INFO L225 Difference]: With dead ends: 228279 [2018-07-24 12:52:52,479 INFO L226 Difference]: Without dead ends: 154161 [2018-07-24 12:52:52,754 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1427 GetRequests, 1336 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1354, Invalid=7202, Unknown=0, NotChecked=0, Total=8556 [2018-07-24 12:52:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154161 states. [2018-07-24 12:52:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154161 to 145767. [2018-07-24 12:52:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145767 states. [2018-07-24 12:52:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145767 states to 145767 states and 169890 transitions. [2018-07-24 12:52:57,404 INFO L78 Accepts]: Start accepts. Automaton has 145767 states and 169890 transitions. Word has length 318 [2018-07-24 12:52:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:52:57,404 INFO L471 AbstractCegarLoop]: Abstraction has 145767 states and 169890 transitions. [2018-07-24 12:52:57,404 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 12:52:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 145767 states and 169890 transitions. [2018-07-24 12:52:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-07-24 12:52:57,557 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:52:57,558 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:52:57,558 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:52:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash 973085746, now seen corresponding path program 1 times [2018-07-24 12:52:57,558 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:52:57,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:57,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:57,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:52:57,560 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:52:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 12:52:58,171 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:58,172 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:52:58,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:58,180 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:58,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:52:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-07-24 12:52:58,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:52:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 12:52:58,921 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:52:58,921 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:52:58,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:52:58,937 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:52:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:52:59,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 258 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:53:00,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 215 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-07-24 12:53:00,593 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:00,593 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 11, 8] total 27 [2018-07-24 12:53:00,593 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:00,595 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:53:00,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:53:00,596 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:53:00,596 INFO L87 Difference]: Start difference. First operand 145767 states and 169890 transitions. Second operand 11 states. [2018-07-24 12:53:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:07,636 INFO L93 Difference]: Finished difference Result 262901 states and 317228 transitions. [2018-07-24 12:53:07,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:53:07,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 376 [2018-07-24 12:53:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:08,304 INFO L225 Difference]: With dead ends: 262901 [2018-07-24 12:53:08,304 INFO L226 Difference]: Without dead ends: 150236 [2018-07-24 12:53:08,539 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1523 GetRequests, 1491 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:53:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150236 states. [2018-07-24 12:53:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150236 to 147078. [2018-07-24 12:53:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147078 states. [2018-07-24 12:53:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147078 states to 147078 states and 168562 transitions. [2018-07-24 12:53:11,856 INFO L78 Accepts]: Start accepts. Automaton has 147078 states and 168562 transitions. Word has length 376 [2018-07-24 12:53:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:11,856 INFO L471 AbstractCegarLoop]: Abstraction has 147078 states and 168562 transitions. [2018-07-24 12:53:11,856 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:53:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 147078 states and 168562 transitions. [2018-07-24 12:53:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-07-24 12:53:12,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:12,009 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:12,010 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1445721117, now seen corresponding path program 1 times [2018-07-24 12:53:12,010 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:12,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:12,011 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:53:12,575 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:12,575 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:12,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:12,584 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:12,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:53:13,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 236 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:53:13,330 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:13,330 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:13,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:13,346 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:14,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-07-24 12:53:15,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 241 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:53:15,319 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:15,320 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 7] total 16 [2018-07-24 12:53:15,320 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:15,320 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:53:15,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:53:15,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:53:15,321 INFO L87 Difference]: Start difference. First operand 147078 states and 168562 transitions. Second operand 6 states. [2018-07-24 12:53:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:53:26,971 INFO L93 Difference]: Finished difference Result 467100 states and 562140 transitions. [2018-07-24 12:53:26,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:53:26,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 407 [2018-07-24 12:53:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:53:28,292 INFO L225 Difference]: With dead ends: 467100 [2018-07-24 12:53:28,293 INFO L226 Difference]: Without dead ends: 332187 [2018-07-24 12:53:28,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1638 GetRequests, 1618 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:53:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332187 states. [2018-07-24 12:53:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332187 to 323964. [2018-07-24 12:53:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323964 states. [2018-07-24 12:53:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323964 states to 323964 states and 371337 transitions. [2018-07-24 12:53:35,958 INFO L78 Accepts]: Start accepts. Automaton has 323964 states and 371337 transitions. Word has length 407 [2018-07-24 12:53:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:53:35,958 INFO L471 AbstractCegarLoop]: Abstraction has 323964 states and 371337 transitions. [2018-07-24 12:53:35,959 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:53:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 323964 states and 371337 transitions. [2018-07-24 12:53:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-07-24 12:53:36,285 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:53:36,286 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:53:36,286 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:53:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash -522676943, now seen corresponding path program 1 times [2018-07-24 12:53:36,286 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:53:36,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:36,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:36,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:53:36,288 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:53:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:36,928 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:53:37,197 WARN L169 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:53:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 289 proven. 70 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-07-24 12:53:37,383 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:37,383 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:53:37,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:37,391 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:37,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 436 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-07-24 12:53:38,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 335 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 12:53:39,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:53:39,354 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:53:39,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:53:39,371 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:53:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:53:40,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:53:40,820 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2018-07-24 12:53:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 183 proven. 11 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-07-24 12:53:41,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:53:41,302 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-07-24 12:53:41,938 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-07-24 12:53:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 122 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2018-07-24 12:53:43,091 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:53:43,092 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 10, 11] total 33 [2018-07-24 12:53:43,092 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:53:43,098 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:53:43,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:53:43,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 12:53:43,099 INFO L87 Difference]: Start difference. First operand 323964 states and 371337 transitions. Second operand 13 states. [2018-07-24 12:54:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:12,045 INFO L93 Difference]: Finished difference Result 675198 states and 864759 transitions. [2018-07-24 12:54:12,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-07-24 12:54:12,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 437 [2018-07-24 12:54:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:14,148 INFO L225 Difference]: With dead ends: 675198 [2018-07-24 12:54:14,148 INFO L226 Difference]: Without dead ends: 392387 [2018-07-24 12:54:14,656 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1162, Invalid=6848, Unknown=0, NotChecked=0, Total=8010 [2018-07-24 12:54:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392387 states. [2018-07-24 12:54:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392387 to 354542. [2018-07-24 12:54:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354542 states. [2018-07-24 12:54:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354542 states to 354542 states and 403386 transitions. [2018-07-24 12:54:25,156 INFO L78 Accepts]: Start accepts. Automaton has 354542 states and 403386 transitions. Word has length 437 [2018-07-24 12:54:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:25,156 INFO L471 AbstractCegarLoop]: Abstraction has 354542 states and 403386 transitions. [2018-07-24 12:54:25,156 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:54:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 354542 states and 403386 transitions. [2018-07-24 12:54:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-07-24 12:54:25,529 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:25,529 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:25,529 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash -162912776, now seen corresponding path program 1 times [2018-07-24 12:54:25,530 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:25,531 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 253 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2018-07-24 12:54:25,885 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:25,885 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:25,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:25,893 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:26,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-07-24 12:54:33,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:33,548 WARN L169 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-07-24 12:54:33,670 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 12:54:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 231 proven. 139 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-07-24 12:54:33,895 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:54:33,895 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-07-24 12:54:33,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:33,896 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:54:33,896 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:54:33,896 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:54:33,897 INFO L87 Difference]: Start difference. First operand 354542 states and 403386 transitions. Second operand 6 states. [2018-07-24 12:54:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:54:41,514 INFO L93 Difference]: Finished difference Result 666768 states and 755304 transitions. [2018-07-24 12:54:41,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:54:41,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 452 [2018-07-24 12:54:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:54:42,902 INFO L225 Difference]: With dead ends: 666768 [2018-07-24 12:54:42,902 INFO L226 Difference]: Without dead ends: 357736 [2018-07-24 12:54:43,252 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 896 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:54:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357736 states. [2018-07-24 12:54:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357736 to 354846. [2018-07-24 12:54:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354846 states. [2018-07-24 12:54:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354846 states to 354846 states and 403332 transitions. [2018-07-24 12:54:51,226 INFO L78 Accepts]: Start accepts. Automaton has 354846 states and 403332 transitions. Word has length 452 [2018-07-24 12:54:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:54:51,227 INFO L471 AbstractCegarLoop]: Abstraction has 354846 states and 403332 transitions. [2018-07-24 12:54:51,227 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:54:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 354846 states and 403332 transitions. [2018-07-24 12:54:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-07-24 12:54:51,696 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:54:51,696 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:54:51,696 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:54:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1898275893, now seen corresponding path program 1 times [2018-07-24 12:54:51,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:54:51,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:51,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:51,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:54:51,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:54:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 235 proven. 143 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-07-24 12:54:53,487 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:54:53,488 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:54:53,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:54:53,495 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:54:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:54:53,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:54:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-07-24 12:54:54,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:54:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 235 proven. 143 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-07-24 12:54:54,307 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:54:54,307 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:54:54,307 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:54:54,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:54:54,308 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:54:54,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:54:54,309 INFO L87 Difference]: Start difference. First operand 354846 states and 403332 transitions. Second operand 5 states. Received shutdown request... [2018-07-24 12:55:00,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:55:00,058 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:55:00,064 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:55:00,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:55:00 BoogieIcfgContainer [2018-07-24 12:55:00,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:55:00,066 INFO L168 Benchmark]: Toolchain (without parser) took 215204.61 ms. Allocated memory was 1.5 GB in the beginning and 5.6 GB in the end (delta: 4.1 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,067 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:55:00,067 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1288.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 136.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,069 INFO L168 Benchmark]: Boogie Preprocessor took 363.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.7 MB). Peak memory consumption was 62.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,071 INFO L168 Benchmark]: RCFGBuilder took 5144.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 286.5 MB). Peak memory consumption was 286.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,071 INFO L168 Benchmark]: TraceAbstraction took 208266.69 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 2.9 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-07-24 12:55:00,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1288.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 136.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 363.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 794.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -930.7 MB). Peak memory consumption was 62.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5144.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 286.5 MB). Peak memory consumption was 286.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208266.69 ms. Allocated memory was 2.3 GB in the beginning and 5.6 GB in the end (delta: 3.3 GB). Free memory was 1.9 GB in the beginning and 2.9 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1620]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1620). Cancelled while BasicCegarLoop was constructing difference of abstraction (354846states) and interpolant automaton (currently 6 states, 5 states before enhancement), while ReachableStatesComputation was computing reachable states (347845 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.1s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 125.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3985 SDtfs, 26061 SDslu, 5308 SDs, 0 SdLazy, 38531 SolverSat, 9106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13232 GetRequests, 12860 SyntacticMatches, 17 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6225 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=354846occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 38.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 65657 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 2.1s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 29.3s InterpolantComputationTime, 11100 NumberOfCodeBlocks, 11100 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 17456 ConstructedInterpolants, 0 QuantifiedInterpolants, 15227951 SizeOfPredicates, 107 NumberOfNonLiveVariables, 26008 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 53 InterpolantComputations, 7 PerfectInterpolantSequences, 10645/12244 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-55-00-088.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label20_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-55-00-088.csv Completed graceful shutdown